Premium vehicles are all about sophistication. It's a good argument for the BMW i5, a fully electric 5 Series. Packed with tech, refinement and a dollop of Ultimate Driving Machine dynamics, electrification might be the best way to experience the 5 Series (though ICE and PHEV version are available). People admiring the design may be oblivious it's missing a gas powertrain. It's just that subtle. And no trips to the gas station. Tom Voelk checks out a rear-wheel drive eDrive40 model.